1. Department of Materials Chemistry National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
2. Department of Catalysis and Chemical Reaction Engineering National Institute of Chemistry Hajdrihova 19 1000 Ljubljana Slovenia
3. Laboratory of Nanochemistry for Energy (LNCE) Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne CH-1950 Sion Switzerland